CN101913752B - On-line hot preparation method of glass batch - Google Patents

Abstract

The invention discloses an on-line hot preparation method of a glass batch. The method comprises the following steps of: adding a proper quantity of adhesives to a traditional glass batch and pressing the mixture into a block material; preheating to decompose the molded block material in a firing kiln to form a sintered block consisting of silicate and silicon dioxide, immediately pulverizing the block into granules in the hot state; conveying and uniformly scattering the granules into a filling pocket; and pushing into a glass kiln for melting. The on-line hot preparation method of the glass batch can greatly improve the heat conductivity coefficient of the batch, improve the melting rate of the glass kiln, increase the glass capacity and achieve the purpose of saving energy. The compacted glass batch block reduces flying dust in the glass kiln, prolongs the service life of refractory materials, prevents the blockage of a regenerative chamber, purifies the operating environment, reduces the flying loss of the batch and stabilizes the glass component. The method ensures that the melting rate can be improved by 20-30 percent. Compared with a traditional method, the method ensures that the fuel consumed for producing the same quantity of glass can be saved by 10-20 percent.

Description

On-line hot preparation method of glass batch

Technical field

The present invention relates to the preparation method's of glass production raw material, particularly glass batch hot preparation method.

Background technology

Glass industry energy consumption height, Mineral resources consumption is big.Traditional glass production method adopts heat reflection formula melting furnaces mostly, and mainly by flame and big arch radiative transfer, thermo-efficiency is low; The powdery admixtion directly pushes glass melter by batch charger and melts, and can be involved in air in the admixtion push-on process, and the bed of material of formation causes easily that under the flame flow effect dust from flying corrodes the kiln body, and regenerator is stopped up, and operating environment worsens.The density 1.2-1.3t/m3 of powdery admixtion, thermal conductivity 0.2W/m.K, the surperficial contact area between alkali of fluxing and the infusible quartz sand is little, is unfavorable for the carrying out of low-temp reaction, causes that fusing time is long, temperature of fusion is high.Simultaneously, traditional admixtion preparation method, the following ultrafine powder granule content of 0.1mm can not surpass 5%, influences glass quality otherwise can form infusibility material group, and therefore thinner quartz sand can not use, and causes Mineral resources to waste greatly.

A lot of in the world at present countries all successively come the preheating batch aspect to carry out research to the waste heat of granulating of the batch or melting furnaces flue gas as the U.S., Germany, Japan and domestic relevant department; but melting furnaces fume afterheat temperature is low with this preheating temperature admixtion temperature less than 500 ℃.In the glass smelting process, admixtion is when 500 ℃ of left and right sides, and silicate reaction just just begins, and finishes still less than 20%, therefore most of in this way silicate reaction still carries out in glass melter, and the porous effect that a large amount of gases of overflowing in the reaction form still stops the raising of heat transfer efficiency.For example CN101318762 has proposed the granulating of the batch preheating technology, and the powdery admixtion is made spherical pellet, and utilizes fume afterheat to carry out the admixtion of preheating granulation, but energy-saving effect is not obvious.

Summary of the invention

The purpose of this invention is to provide a kind of melting rate that helps improving glass melter, improve the on-line hot preparation method of glass batch of production capacity.

On-line hot preparation method of glass batch of the present invention may further comprise the steps:

(1) by glass metal consumption per ton, take by weighing the required quartz sand of admixtion, feldspar, rhombspar, calcite, Wingdale, soda ash, saltcake, SODIUMNITRATE, aluminium hydroxide and weisspiessglanz, add caking agent and water, after mixing together, be pressed into density 1.9～2.5t/m ³, be of a size of the block material of 300 * 300 * 10～600 * 600 * 30mm;

(2) the block material of compression moulding is sent in the burning kiln, the fume afterheat and the fuel heating that utilize glass melter to produce, make material 700～1000 ℃ of preheatings, form the sinter pieces that silicate and silicon-dioxide are formed, and be broken under hot immediately and be of a size of 25 * 25 * 10～50 * 50 * 30mm pellet, again pellet is carried and evenly is sprinkling upon in the pond that feeds intake, push the glass melter fusing.

Above-mentioned caking agent can be 3～5: 0.5～3 for wilkinite, water glass and starch by weight: 1～3 mixture, the consumption of caking agent are 1～10% of admixtion gross weight.The consumption of water is 2～6% of an admixtion gross weight.

Said burning kiln can be roller kiln or mesh-belt kiln or carrier bar kiln among the present invention.

Beneficial effect of the present invention is:

1) in traditional glass batch, adds caking agent, be pressed into density 1.9～2.5t/m ³, be of a size of the block material of 300 * 300 * 10～600 * 600 * 30mm after, can increase substantially the reaction area between the various feed particles, improve the thermal conductivity of admixtion;

2) the block admixtion to closely knit processing carries out the fritting processing, silicate in the glass smelting process is formed be reflected at glass melter and carry out outward, what put into glass melter is the opaque sinter that silicate and silicon-dioxide are formed, and improves the melting rate of glass melter, improves production capacity.

3) the block material after the thermolysis is carried out immediately the heat fragmentation, can avoid calorific loss.The present invention can implement total oxygen direct-firing easily.And the melting furnaces fume afterheat can be applied in the calcining kiln in conjunction with fuel combustion, increase substantially the thermo-efficiency of melting furnaces.

4) the glass batch block after the compacting has reduced the dust from flying in the glass melter, prolongs refractory life, prevents that regenerator from stopping up, the cleansing operation environment; Reduce admixtion and fly damage, stabilized glass composition.

5) the following ultrafine powder granule content of 0.1mm in the admixtion is reached more than 30%, obtain more utilizations, save Mineral resources.

6) utilize the present invention can make melting rate can improve 20～35%, produce the glass of same amount, compare consumption 10～20% capable of saving fuel with conventional production methods.

Embodiment

Further set forth method of the present invention with embodiment below.

Embodiment 1

Day melt be on 450 tons the floatation glass production line, by glass metal consumption per ton, take by weighing 730 kilograms of quartz sands, 30 kilograms of feldspars, 210 kilograms of rhombspars, 50 kilograms in Wingdale, 220 kilograms of soda ash, 12 kilograms in saltcake, the caking agent that adds 20 kilograms again, be delivered to hydropress after mixing together with 60 kg of water, be pressed into density and be about 2.3t/m ³, be of a size of the block material of 550 * 550 * 20mm; Wherein caking agent is that wilkinite, water glass and starch mixed by weight 3.5: 1.8: 2.

The block material of compression moulding is transported in the roller kiln with transfer roller heats, the fume afterheat and the fuel heating that utilize glass melter to produce, make material 900 ℃ of preheatings, form the sinter pieces that silicate and silicon-dioxide are formed, deliver to immediately in the crusher to be broken under hot and be of a size of 25 * 25 * 20～50 * 50 * 20mm pellet, again pellet is carried and evenly is sprinkling upon in the pond that feeds intake, push the glass melter fusing.

After measured: after the admixtion briquetting heating fritting, melting rate is by the 1.6t/m of traditional float glass ²D is increased to 2.1t/m ²D, per kilogram glass metal heat dissipation only accounts for 82% of traditional float glass heat dissipation.

Embodiment 2

Day melt be on 110 tons the horse shoe flame melting furnaces rolled glass production line, by glass metal consumption per ton, take by weighing 725 kilograms of quartz sands, 95 kilograms in calcite, the rhombspar 120 kg, 230 kilograms of soda ash, 5 kilograms in saltcake, 15 kilograms of SODIUMNITRATE, 18 kilograms in aluminium hydroxide, 1.8 kilograms of weisspiessglanzs, with wilkinite, water glass, caking agent that starch is formed and water mix and join in the glass batch, wherein, wilkinite, water glass, the ratio of starch (weight ratio)=3.5: 1.3: 1.5, add-on be the admixtion total amount 5%, the consumption of water is 3% of an admixtion total amount, above material is mixed together evenly, be transported to automatic hydraulic press by rotary conveyor, utilize automatic hydraulic press to make admixtion be pressed into density and be about 2.2t/m ³Size is the lumpy material of 550 * 550 * 20mm, admixtion after the moulding is heated to mesh-belt kiln by conveyor delivery, material is decomposed, the admixtion that process is decomposed is sent to and carries out the heat fragmentation in the crusher, be broken into the material that size is 25 * 25 * 20～50 * 50 * 20mm, again mass transport also evenly be sprinkling upon in the pond that feeds intake, push in the horse shoe flame glass melter and melt.

After measured: after the admixtion briquetting heating fritting, glass output can be brought up to 110T/d by 90T/d, and per kilogram glass metal heat dissipation accounts for 83% of traditional float glass.

Claims (2)

1. on-line hot preparation method of glass batch is characterized in that may further comprise the steps:

(1) by glass metal consumption per ton, take by weighing the required quartz sand of admixtion, feldspar, rhombspar, calcite, Wingdale, soda ash, saltcake, SODIUMNITRATE, aluminium hydroxide and weisspiessglanz, add caking agent and water, after mixing together, be pressed into density 1.9～2.5t/m ³, be of a size of the block material of 300 * 300 * 10～600 * 600 * 30mm; Quartz sand is that 700～800 kilograms, feldspar are that 0～40 kilogram, rhombspar are that 50～230 kilograms, calcite are that 0～105 kg, Wingdale are that 0～60 kilogram, soda ash are that 180～240 kilograms, saltcake are 1～17 kilogram in the admixtion, and SODIUMNITRATE is that 0～20 kilogram, aluminium hydroxide are that 0～22 kilogram, weisspiessglanz are 0～4 kilogram; Caking agent is that wilkinite, water glass and starch are 3～5: 0.5～3 by weight: 1～3 mixture, the consumption of caking agent are 1～10% of admixtion gross weight; The consumption of water is 2～6% of an admixtion gross weight;

(2) the block material of compression moulding is sent in the burning kiln, the fume afterheat and the fuel heating that utilize glass melter to produce, make material 700～1000 ℃ of preheatings, form the sinter pieces that silicate and silicon-dioxide are formed, and be broken under hot immediately and be of a size of 25 * 25 * 10～50 * 50 * 30mm pellet, again pellet is carried and evenly is sprinkling upon in the pond that feeds intake, push the glass melter fusing.

2. on-line hot preparation method of glass batch according to claim 1 is characterized in that burning kiln is roller kiln or mesh-belt kiln or carrier bar kiln.